Electronic control circuit and acoustic-signal emitting device for vehicles
First Claim
1. An electronic control circuit (50) of a loudspeaker (LDSK) for vehicles for emitting at least a first acoustic signal characteristic of an alarm siren, said electronic circuit comprising:
- a storage means for storing a plurality of digital samples representative of at least one portion of a reference acoustic signal which may be generated by a sample acoustic warning device, a processing means for generating, on the basis of the plurality of samples, a modulated electrical signal (S1, S2) carrying at least a portion of the harmonic content associated with the reference acoustic signal, and a driver circuit (DRV-CR) for receiving the modulated electrical signal (S1;
S2) and supplying to the loudspeaker (LDSK) a corresponding driving signal for the emission of a second acoustic signal substantially reproducing the at least one portion of the reference acoustic signal.
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Accused Products
Abstract
An electronic control circuit (50) of a loudspeaker (LDSK) for vehicles, for emitting at least a first acoustic signal characteristic of an alarm siren is characterized in that it comprises storage means (Flash) for storing a plurality of digital samples representative of at least a portion of a reference acoustic signal which can be generated by a sample acoustic warning device, processing means (μP) for generating, on the basis of the plurality of samples, a modulated electrical signal (S1, S2) carrying at least a portion of the harmonic content associated with the reference acoustic signal, (S1, S2) and supplying to the loudspeaker (LDSK) a corresponding driving signal for the emission of a second acoustic signal substantially reproducing the at least one portion of the reference acoustic signal.
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Citations
30 Claims
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1. An electronic control circuit (50) of a loudspeaker (LDSK) for vehicles for emitting at least a first acoustic signal characteristic of an alarm siren, said electronic circuit comprising:
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a storage means for storing a plurality of digital samples representative of at least one portion of a reference acoustic signal which may be generated by a sample acoustic warning device, a processing means for generating, on the basis of the plurality of samples, a modulated electrical signal (S1, S2) carrying at least a portion of the harmonic content associated with the reference acoustic signal, and a driver circuit (DRV-CR) for receiving the modulated electrical signal (S1;
S2) and supplying to the loudspeaker (LDSK) a corresponding driving signal for the emission of a second acoustic signal substantially reproducing the at least one portion of the reference acoustic signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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Specification